修复添加化妆品无法更改过期时间的bug

Cosmetic.cpp

@@ -26,6 +26,12 @@ void Cosmetic::setPrice(double price) {
 void Cosmetic::setType(bool type) {
     this->type = type;
 }
+// 设置过期日期
+void Cosmetic::setExpirationDate(std::string expirationDate) {
+    this->expirationDate = expirationDate;
+}
+
+
 
 std::string Cosmetic::getExpirationDate() const {
     return expirationDate;